Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bd1ce71b7f2431…

MALICIOUS

PDF

81.9 KB Created: 2021-03-20 07:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c39c343e9126d2260a1be87660b26255 SHA-1: 5902f4d4786c12f91b63c76cf4a01133b8b06dc8 SHA-256: 23bd1ce71b7f2431143adcf257932a6e1aead311c60a1998a6d2aa2916d68e31
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://seumenha.ru/strik?utm_term=in+christ+alone+hymn+story` suggests a phishing lure, disguised with a hymn story title. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=in+christ+alone+hymn+story
    • http://7gusevshop.space/vodajiimoce.pdf
    • http://tamakar.tech/675711686e7gef.pdf
    • http://flowerport.market/lesson_plan_template_esl_docdfvmx.pdf
    • https://cdn-cms.f-static.net/uploads/4530937/normal_603c5de38e3c6.pdf
    • https://cdn-cms.f-static.net/uploads/4496812/normal_60170fb50b7e6.pdf
    • https://semotifivunadi.weebly.com/uploads/1/3/1/3/131380295/780348a9fd.pdf
    • https://cdn-cms.f-static.net/uploads/4487888/normal_6053b4ba5c441.pdf
    • http://silvanozito.online/flexner_report_191096qul.pdf
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/leluxopogo.pdf
    • https://cdn-cms.f-static.net/uploads/4372371/normal_604d03c20b377.pdf
    • http://teksalle.xyz/nedexonixekepugunazuvz4qm5.pdf
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6052fdf0942f6.pdf
    • http://prizinsta365.website/smooth_4_app_androidklxf2.pdf
    • http://msertis.xyz/46409926319z7e54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokatefozude/baxig.pdf
    • https://uploads.strikinglycdn.com/files/9cd2a32c-3035-4eaa-813d-b03b8f6252a2/murray_push_mower_air_filter.pdf
    • https://uploads.strikinglycdn.com/files/a453dded-c901-4021-86ed-e179fe4cf4b2/dosotofojokinetowasi.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/mb_carsoft_7._4_multiplexer_software.pdf
    • https://uploads.strikinglycdn.com/files/74390d62-1ecc-442a-8a5d-7b0f77c96718/parrot_ck3100_fitted_price.pdf
    • https://uploads.strikinglycdn.com/files/91d0ecef-17c8-4875-9e69-d6160e5d821c/which_learning_style_works_best_for_most_preschoolers.pdf
    • https://s3.amazonaws.com/gotitibekovi/how_much_is_a_dozen_dunkin_donuts.pdf
    • https://uploads.strikinglycdn.com/files/358e6f13-fc72-4278-a45b-e525c708f32e/vapomajuvexesuwux.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010185.bin
04d06e84e1ac73714bd1ff6236841a2e63f174e8d94395d7dd9ae3f47c93ce19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 5080 bytes
font_01_sfnt_off000112a8.bin
540e935b48873e28f235365953031ea6d200d36bdae9a8746a4b930215ec3560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 11176 bytes

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